This list includes several locations on the Isle of Man, which is not part of the United Kingdom.
Si
|- class="vcard" | class="fn org" | Siabost | class="adr" | Western Isles | class="note" | | class="note" | |- class="vcard" | class="fn org" | Siabost bho Dheas | class="adr" | Western Isles | class="note" | | class="note" | |- class="vcard" | class="fn org" | Siabost bho Thuath | class="adr" | Western Isles | class="note" | | class="note" | |- class="vcard" | class="fn org" | Siadar | class="adr" | Western Isles | class="note" | | class="note" | |- class="vcard" | class="fn org" | Siadar Iarach | class="adr" | Western Isles | class="note" | | class="note" | |- class="vcard" | class="fn org" | Siadar Uarach | class="adr" | Western Isles | class="note" | | class="note" | |- class="vcard" | class="fn org" | Sibbaldbie | class="adr" | Dumfries and Galloway | class="note" | | class="note" | |- class="vcard" | class="fn org" | Sibbertoft | class="adr" | Northamptonshire | class="note" | | class="note" | |- class="vcard" | class="fn org" | Sibdon Carwood | class="adr" | Shropshire | class="note" | | class="note" | |- class="vcard" | class="fn org" | Sibertswold (Shepherdswell) | class="adr" | Kent | class="note" | | class="note" | |- class="vcard" | class="fn org" | Sibford Ferris | class="adr" | Oxfordshire | class="note" | | class="note" | |- class="vcard" | class="fn org" | Sibford Gower | class="adr" | Oxfordshire | class="note" | | class="note" | |- class="vcard" | class="fn org" | Sible Hedingham | class="adr" | Essex | class="note" | | class="note" | |- class="vcard" | class="fn org" | Sibley's Green | class="adr" | Essex | class="note" | | class="note" | |- class="vcard" | class="fn org" | Sibsey | class="adr" | Lincolnshire | class="note" | | class="note" | |- class="vcard" | class="fn org" | Sibsey Fen Side | class="adr" | Lincolnshire | class="note" | | class="note" | |- class="vcard" | class="fn org" | Sibson | class="adr" | Cambridgeshire | class="note" | | class="note" | |- class="vcard" | class="fn org" | Sibson | class="adr" | Leicestershire | class="note" | | class="note" | |- class="vcard" | class="fn org" | Sibthorpe | class="adr" | Nottinghamshire | class="note" | | class="note" | |- class="vcard" | class="fn org" | Sibthorpe Place | class="adr" | Nottinghamshire | class="note" | | class="note" | |- class="vcard" | class="fn org" | Sibton | class="adr" | Suffolk | class="note" | | class="note" | |- class="vcard" | class="fn org" | Sicklesmere | class="adr" | Suffolk | class="note" | | class="note" | |- class="vcard" | class="fn org" | Sicklinghall | class="adr" | North Yorkshire | class="note" | | class="note" | |- class="vcard" | class="fn org" | Sid | class="adr" | Devon | class="note" | | class="note" | |- class="vcard" | class="fn org" | Sidbrook | class="adr" | Somerset | class="note" | | class="note" | |- class="vcard" | class="fn org" | Sidbury | class="adr" | Devon | class="note" | | class="note" | |- class="vcard" | class="fn org" | Sidbury | class="adr" | Shropshire | class="note" | | class="note" | |- class="vcard" | class="fn org" | Sidcot | class="adr" | North Somerset | class="note" | | class="note" | |- class="vcard" | class="fn org" | Sidcup | class="adr" | Bexley | class="note" | | class="note" | |- class="vcard" | class="fn org" | Siddal | class="adr" | Calderdale | class="note" | | class="note" | |- class="vcard" | class="fn org" | Siddick | class="adr" | Cumbria | class="note" | | class="note" | |- class="vcard" | class="fn org" | Siddington | class="adr" | Gloucestershire | class="note" | | class="note" | |- class="vcard" | class="fn org" | Siddington | class="adr" | Cheshire | class="note" | | class="note" | |- class="vcard" | class="fn org" | Siddington Heath | class="adr" | Cheshire | class="note" | | class="note" | |- class="vcard" | class="fn org" | Sidemoor | class="adr" | Worcestershire | class="note" | | class="note" | |- class="vcard" | class="fn org" | Side of the Moor | class="adr" | Bolton | class="note" | | class="note" | |- class="vcard" | class="fn org" | Sidestrand | class="adr" | Norfolk | class="note" | | class="note" | |- class="vcard" | class="fn org" | Sideway | class="adr" | City of Stoke-on-Trent | class="note" | | class="note" | |- class="vcard" | class="fn org" | Sidford | class="adr" | Devon | class="note" | | class="note" | |- class="vcard" | class="fn org" | Sidinish | class="adr" | Western Isles | class="note" | | class="note" | |- class="vcard" | class="fn org" | Sidlesham | class="adr" | West Sussex | class="note" | | class="note" | |- class="vcard" | class="fn org" | Sidlesham Common | class="adr" | West Sussex | class="note" | | class="note" | |- class="vcard" | class="fn org" | Sidley | class="adr" | East Sussex | class="note" | |